Wegener DTV742, Руководство пользователя

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DTV 742 User’s Manual
wegener.com 23 800057-01 Rev. B
Stream Info
Page The Stream Info page (see Figure 3.2) displays complete data on each input
and output stream. This page contains information only and does not provide
any user control.
The left side lists the program streams contained in each RF input. The first
item shown for each input is the short name and the major and minor channel
numbers of the signal. Because a transport stream signal may contain more
than one program, information on all programs in each RF input is given. The
program number and the PID numbers of the PMT and PCR are shown for
each program. This is followed by the PID numbers of all video, audio, and
data PIDs in the stream. PIDs that are not included in the PMT are listed as
Ghost PIDs. Note that channel and program numbers are always in decimal
notation while PID numbers are shown either as decimal or hexadecimal
depending on your selection on the Control & Status page. Decimal numbers
are indicated as 123 while hexadecimal numbers are indicated as 0x123. The
right side of the page shows the programs contained in each of the ASI output
streams.
Acquiring Broadcast ATSC Signals
As with the traditional television broadcast, you will need a good-quality
outdoor antenna pointed toward the transmitter. With the antenna correctly
positioned and the cable connected to the DTV742’s RF input, select the
channel number on the front panel or via the web interface. Note that this is
the ATSC RF channel number (not the broadcaster’s legacy analog channel).
Weak Signal - If you’re within reception range you should see an SNR
between 20 dB and 35 dB with no errored seconds. An SNR less than 20 dB
with accumulating errored seconds indicates a weak signal condition that
results in impaired video and audio. Adjust antenna pointing for maximum
signal (higher SNR). If this is not successful, you may need a line amplifier
or a higher gain antenna.
Multipath - If you have video problems and the SNR shows wide fluctua-
tions, you may be experiencing multipath reception which is the simulta-
neous reception of the direct signal plus a strong reflection. Rotating the
antenna away from the interfering signal may solve this problem.